【单选题】下面哪个选项可以获取Runtime类的实例()
A. Runtime r = new Runtime();
B. Runtime r = Runtime.getRuntime();
C. Runtime r = Runtime.getInstance();
D. 其余选项都不能获取Runtime实例
A. Runtime r = new Runtime();
B. Runtime r = Runtime.getRuntime();
C. Runtime r = Runtime.getInstance();
D. 其余选项都不能获取Runtime实例
